Re: [Pdns-users] PowerDNS Master / Slave
Hi all, Il 05/08/2011 20:03, Ian Mordey ha scritto: I have powerdns running perfectly using a MySQL cluster to store the data. The way I do it is have the pdns servers run a local copy of MySQL and replicate from the cluster. This eliminates downtime if the link between the geographically separate DNS servers and the master cluster is down. I don't have AXFR master/slave setup anywhere as any updates are made to the cluster table and this is replicated out to the local mysql instance. Cheers Ian I have the same implementation as described by Ian. Now, I have to handle even the SLAVE zones, for our customers who prefer to manage domains on their servers (AXFR master/slave setup). So I have to manage NATIVE domains for those customers that use our DNS tool panel and SLAVE domains for customers who have a their own server that acts as a master. In this scenario, the local 'records' table on two DNS servers would be written: - by native replication from MySQL cluster for records of NATIVE zone - by pdns daemon for records of SLAVE zone ... having as a result a misalignment of the 'records' tables on the local and cluster MySQL instance. Can I configure pdns to cache the AXFR records without saving them on local DB? Or more generally, what is the best way to implement my scenario? Kind regards, Cristian ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
Re: [Pdns-users] PowerDNS Master / Slave
I have powerdns running perfectly using a MySQL cluster to store the data. The way I do it is have the pdns servers run a local copy of MySQL and replicate from the cluster. This eliminates downtime if the link between the geographically separate DNS servers and the master cluster is down. I don't have AXFR master/slave setup anywhere as any updates are made to the cluster table and this is replicated out to the local mysql instance. Cheers Ian On 3 Aug 2011, at 15:48, Stefan Schmidt zaph...@zaphods.net wrote: Hi There, On Wed, Aug 3, 2011 at 4:11 PM, Support Desk support.desk@gmail.com wrote: I am looking into deploying two powerdns Servers on my Network. I would like both to use a mysql cluster that I have setup as their backend. My question is, if both servers are letting the MySql cluster do the replication, should they both be configured as Masters? If the backend - in this case mysql - is doing the replication itself we are calling it 'Native' mode. You would only need to set master=yes in pdns.conf in order to enable your name servers sending out DNS NOTIFY messages to all servers mentioned as NS records for a zone that has changed recently. In Mysql PowerDNS will then update the last notified_serial column of the domains table in your database. slave=yes will enable PowerDNS to listen to such NOTIFIES and if the domain is of type 'SLAVE' it will then try to AXFR the zone and subsequently update all entries in the records table. Thus enabling either master or slave bears a slight risk that both of your PowerDNS servers will try to update the same column at once. I am not entirely sure how a MySQL cluster would handle this kind of deadlock. Gracefully i'd hope. Stefan ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
Re: [Pdns-users] PowerDNS Master / Slave
Hi There, On Wed, Aug 3, 2011 at 4:11 PM, Support Desk support.desk@gmail.com wrote: I am looking into deploying two powerdns Servers on my Network. I would like both to use a mysql cluster that I have setup as their backend. My question is, if both servers are letting the MySql cluster do the replication, should they both be configured as Masters? If the backend - in this case mysql - is doing the replication itself we are calling it 'Native' mode. You would only need to set master=yes in pdns.conf in order to enable your name servers sending out DNS NOTIFY messages to all servers mentioned as NS records for a zone that has changed recently. In Mysql PowerDNS will then update the last notified_serial column of the domains table in your database. slave=yes will enable PowerDNS to listen to such NOTIFIES and if the domain is of type 'SLAVE' it will then try to AXFR the zone and subsequently update all entries in the records table. Thus enabling either master or slave bears a slight risk that both of your PowerDNS servers will try to update the same column at once. I am not entirely sure how a MySQL cluster would handle this kind of deadlock. Gracefully i'd hope. Stefan ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
[Pdns-users] PowerDNS Master/Slave
Hi.. Im trying to setup a PowerDNS server, one acting as master and the other one acting as slave... im running debian on both computer.. the problem is that.. when i add a domain in the database on my master (10.1.1.248), then i expect my slave (10.1.1.249) to get a notify about that.. and add it right away.. but nothing happens.. when i make a lookup on the master everything works fine.. but when i ask the slave.. i get no return. i hope that someone can give me some help.. or some hints of what i possible can do wrong. my configuration, database and log is below: master config: allow-axfr-ips=10.1.1.249 config-dir=/etc/powerdns daemon=yes disable-axfr=yes guardian=yes launch=gmysql lazy-recursion=yes local-address=10.1.1.248 local-port=53 master=yes module-dir=/usr/lib/powerdns recursor=MY ISP setgid=pdns setuid=pdns socket-dir=/var/run version-string=powerdns include=/etc/powerdns/pdns.d mysql select * from domains; ++--+-++++-+-+-+-+ | id | fkuserid | name| master | last_check | type | notified_serial | account | reverse | cdatetime | ++--+-++++-+-+-+-+ | 1 |1 | sarge.lan | NULL | NULL | NATIVE |NULL | NULL| 0 | 2007-02-09 14:26:33 | ++--+-++++-+-+-+-+ mysql select * from records where domain_id=3; ++---+---+--+--+---+--+-+-+--+ | id | domain_id | name | type | content | ttl | prio | change_date | cdatetime | editable | ++---+---+--+--+---+--+-+-+--+ | 11 | 1 | sarge.lan | SOA | sarge.lan [EMAIL PROTECTED] 2007020902 | 86400 | NULL |NULL | 2007-02-09 14:26:33 |0 | | 12 | 1 | sarge.lan | NS | ns1.example.com | 86400 | NULL |NULL | 2007-02-09 14:26:33 |0 | | 13 | 1 | sarge.lan | NS | ns2.example.com | 86400 | NULL |NULL | 2007-02-09 14:26:33 |0 | | 14 | 1 | sarge.lan | A| 10.1.1.248 | 86400 | NULL |NULL | 2007-02-09 14:26:33 |1 | | 15 | 1 | ns1.sarge.lan | A| 10.1.1.248 | 86400 | NULL |NULL | 2007-02-09 14:26:52 |1 | | 16 | 1 | ns2.sarge.lan | A| 10.1.1.249 | 86400 | NULL |NULL | 2007-02-09 14:37:02 |1 | ++---+---+--+--+---+--+-+-+--+ and the slave: first the configuration file: config-dir=/etc/powerdns daemon=yes disable-axfr=yes guardian=yes launch=gmysql lazy-recursion=yes local-address=10.1.1.249 local-port=53 module-dir=/usr/lib/powerdns recursor=62.199.234.11 setgid=pdns setuid=pdns slave=yes socket-dir=/var/run version-string=powerdns include=/etc/powerdns/pdns.d mysql select * from supermasters; ++++-+-+ | id | ip | nameserver | account | cdatetime | ++++-+-+ | 1 | 10.1.1.248 | sarge.lan | NULL| 2007-02-09 14:20:31 | ++++-+-+ 1 row in set (0.00 sec) [EMAIL PROTECTED]:~$ host -a sarge.lan Trying sarge.lan Host sarge.lan not found: 3(NXDOMAIN) Received 102 bytes from 10.1.1.249#53 in 3 ms [EMAIL PROTECTED]:~$ cat /etc/resolv.conf nameserver 10.1.1.249 nameserver 10.1.1.248 [EMAIL PROTECTED]:~$ host -a sarge.lan Trying sarge.lan ;; -HEADER- opcode: QUERY, status: NOERROR, id: 5201 ;; flags: qr aa rd; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;sarge.lan. IN ANY ;; ANSWER SECTION: sarge.lan. 86400 IN SOA sarge.lan. user.sarge.lan. 2007020902 10800 3600 604800 3600 sarge.lan. 86400 IN NS ns2.example.com. sarge.lan. 86400 IN NS ns1.example.com. sarge.lan. 86400 IN A 10.1.1.248 Received 140 bytes from 10.1.1.248#53 in 123 ms [EMAIL PROTECTED]:~$ cat /etc/resolv.conf nameserver 10.1.1.248 nameserver 10.1.1.249 -- mvh Michael Holm ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
